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Effective Solar Cells with Lesser Driving Force

By Parul Gupta October 7, 2016

Organic solar cells have now been introduced with a suggestively faster charge and lower driving force separation than conventional cells, confirms scientists.
 
 
 
Scientists at Linkoping University, together with American and Chinese colleagues, have introduced organic solar cells with a drastically less driving force and much rapid charge separation than conventional cells. It was considered that effective operation of organic solar cells needs a huge driving force that limits the efficacy of organic solar cells. Now, a big group of scientists headed by Feng Gao, a professor at IFM at Liu, He Yan at the Hong Kong University of Technology and Science, and Kenan Gundogdu at the State University of North Carolina have introduced effective organic solar cells with extremely less driving force.
 
It implies that the inherent restrictions of organic solar cells are no bigger than those of other sorts of photovoltaic technologies, bringing them a step near to commercialization. When photons released by the sun are fascinated by organic semiconductors, powerfully bound excitons are released. The stimulating force is to place a measure of the energy that is utilized to split the excitons into permitted carriers. The driving core leads to loss of photovoltage, a central parameter for the solar cell. The lesser driving force, the greater the photovoltage.
 
Conventionally, effective organic solar cells are mainly composed of semiconducting polymer and carbon based balls termed as ‘fullerene.’ In such situation, a bigger driving force is vitally required for effective charge generation. In the current work, the scientists have replaced fullerene with a small material of semiconducting substance. They witnessed that a less driving force is required for effective operation of the gadgets. Moreover, organic solar cells that are based on polymer needed small molecule combinations and are more stable, as revealed in another study disclosed by Feng Gao and his associates in Bejing.
 
“We have introduced a system with the excellent potential to enhance the overall power conversion efficacy in organic solar cells,” confirms Feng Gao. With such advancement, it is expected that now it would be feasible as well as cost-effective to serve numerous applications where a higher volume of energy efficiency is needed. Also, it is expected that the overall expenditure of transforming sun’s energy into electrical energy would get reduced to great extent.
 
Since it is an invention equal to the potentials of photovoltaic technologies so it is also expected that the results that are attainable from this study would not just be great in terms of effectiveness but also in terms of overall performance. The study still needs to test and reveal the actual volume of energy that can be converted at a given point of time.
 
Feng Gao, along with his team members that comprises lecturer Olle Inganas, Lecturer of Fengling Zhang, postdoctoral Jonas Bergqvist and Ph.D student known as Deping Qian, illustrated in the article solar cells with a higher energy efficacy of 9.5 percent that implies that overall 9.5 percent of the total energy of sunlight is transformed into electricity.

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